package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    DishMapper dishMapper;
    @Autowired
    DishFlavorMapper dishFlavorMapper;
    @Autowired
    SetmealDishMapper setmealDishMapper;


    /**
     * 新增菜品
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWhitFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);
        //获取当前菜品的ID
        Long id = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();

        //向口味表插入N条数据
        if (flavors != null && flavors.size() > 0) {

            flavors.forEach(flavor ->
            flavor.setDishId(id)

            );

            dishFlavorMapper.insertBatch(flavors);

        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {

        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());


       Page<DishVO> page= dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }


    /**
     * 菜品批量删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否处于起售状态
        for (long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断菜品是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdByDIshIds(ids);

        if (setmealIds != null && setmealIds.size() >0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//        //删除菜品表中餐品数据
//        for (long id : ids) {
//            dishMapper.deleteById(id);
//            //根据菜品Id删除对应的口味
//
//            dishFlavorMapper.deleteByDishId(id);
//
//        }

        //代码优化,批量删除菜品
        dishMapper.deleteByIds(ids);

        //根据菜品Id集合批量删除口味

        dishFlavorMapper.deleteByDishIds(ids);



    }

    /**
     * 根据菜品id查询菜品和口味
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据Id查询菜品信息
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味信息

        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();

        BeanUtils.copyProperties(dish,dishVO);

        dishVO.setFlavors(dishFlavors);

        return dishVO;


    }

    /**
     * 根据id修改菜品和口味
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO,dish);

        //修改菜品表基本信息
        dishMapper.update(dish);

        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入口味数据
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();

        if (dishFlavors != null && dishFlavors.size() > 0){
            //给口味插上菜品id
            dishFlavors.forEach(dishFlavor -> dishFlavor.setDishId(dishDTO.getId()));

            //批量添加口味
            dishFlavorMapper.insertBatch(dishFlavors);
        }

    }




    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {

        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 菜品的起售与停售
     * @param id
     * @param status
     */
    public void startOrstop(Long id, Integer status) {

        Dish dish = new Dish();
        dish.setId(id);
        dish.setStatus(status);
        dishMapper.update(dish);
    }
}
